Mercurial > hg > truffle
diff graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/call/SLInvokeNode.java @ 13943:89ac75425681
SL: small cleanups
author | Christian Wimmer <christian.wimmer@oracle.com> |
---|---|
date | Wed, 12 Feb 2014 10:30:42 -0800 |
parents | graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/call/SLCallNode.java@afd6fa5e8229 |
children | a08b8694f556 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/call/SLInvokeNode.java Wed Feb 12 10:30:42 2014 -0800 @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package com.oracle.truffle.sl.nodes.call; + +import com.oracle.truffle.api.*; +import com.oracle.truffle.api.dsl.*; +import com.oracle.truffle.api.frame.*; +import com.oracle.truffle.api.nodes.*; +import com.oracle.truffle.sl.nodes.*; +import com.oracle.truffle.sl.runtime.*; + +/** + * The node for function invocation in SL. Since SL has first class functions, the + * {@link SLFunction target function} can be computed by an {@link #functionNode arbitrary + * expression}. This node is responsible for evaluating this expression, as well as evaluating the + * {@link #argumentNodes arguments}. The actual dispatch is then delegated to a chain of + * {@link SLAbstractDispatchNode}s that form a polymorphic inline cache. + */ +@NodeInfo(shortName = "invoke") +public final class SLInvokeNode extends SLExpressionNode { + + public static SLInvokeNode create(SLExpressionNode function, SLExpressionNode[] arguments) { + return new SLInvokeNode(function, arguments, new SLUninitializedDispatchNode()); + } + + @Child protected SLExpressionNode functionNode; + @Children protected final SLExpressionNode[] argumentNodes; + @Child protected SLAbstractDispatchNode dispatchNode; + + private SLInvokeNode(SLExpressionNode functionNode, SLExpressionNode[] argumentNodes, SLAbstractDispatchNode dispatchNode) { + this.functionNode = adoptChild(functionNode); + this.argumentNodes = adoptChildren(argumentNodes); + this.dispatchNode = adoptChild(dispatchNode); + } + + @Override + @ExplodeLoop + public Object executeGeneric(VirtualFrame frame) { + SLFunction function = evaluateFunction(frame); + + /* + * The number of arguments is constant for one invoke node. During compilation, the loop is + * unrolled and the execute methods of all arguments are inlined. This is triggered by the + * ExplodeLoop annotation on the method. The compiler assertion below illustrates that the + * array length is really constant. + */ + CompilerAsserts.compilationConstant(argumentNodes.length); + + Object[] argumentValues = new Object[argumentNodes.length]; + for (int i = 0; i < argumentNodes.length; i++) { + argumentValues[i] = argumentNodes[i].executeGeneric(frame); + } + SLArguments arguments = new SLArguments(argumentValues); + + return dispatchNode.executeDispatch(frame, function, arguments); + } + + private SLFunction evaluateFunction(VirtualFrame frame) { + try { + /* + * The function node must evaluate to a SLFunction value, so we call + * function-specialized method. + */ + return functionNode.executeFunction(frame); + } catch (UnexpectedResultException ex) { + /* + * The function node evaluated to a non-function result. This is a type error in the SL + * program. We report it with the same exception that Truffle DSL generated nodes use to + * report type errors. + */ + throw new UnsupportedSpecializationException(this, new Node[]{functionNode}, ex.getResult()); + } + } +}